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UNITED STATES PATENT OFFICE.

HENRY G. HUTGHINSON, O13" GAYUGA, NEW YORK.

LAMP.

Specification of Letters Patent No. 34,964, dated April 15, 1862.

To all whom it may concern:

Be it known that I, HENRY O. HUTOHIN- SON, of Cayuga, in the county of Cayuga and State of New York, have invented new and useful Improvements in Kerosene- Lamps; and I do hereby declare that the following is a full, clear, and exact descrip tion of the construction and operation of the same, reference being had to the annexed drawings, making a part of the specification, in which- Figure 1 is a perspective view, Fig. 2 a vertical section, and Fig. 3 a vertical section in detail of the slide.

Fig. 1, A, outer cylinder or tube surrounding the wick, above lamp; B, slide, for raising and lowering wick; C, inner tube or flue, running down through the body of the lamp; D, D, wick, hanging loose below the slide; E, handle to slide; F, guard, across inner tube or flue. The small letters a, (Z, 0, indicate the inner surfaces of parts indicated by corresponding capital letters.

Fig. 2, A, vertical section of outer tube; B vertical section of slide with spring inside; C vertical section of flue; F section of guard; L body of lamp.

Fig. 3, B, Vertical section of slide; H, spring attached to the inner surface of slide at the bottom; K, point to which sprin moves when the handle E is pressed inward to remove the slide from cylinder.

The lamp to which my invention is to be applied must be constructed with a flue, running down through the body of the lamp, which feeds the flame with air. I disclaim the invention of the flue. I place a guard upon the upper part of the flue as shown at F in the accompanying drawing. The guard is in the form of a perforated plate or wire screen. The object or effect of the guard is to counteract the tendency of the gas to drop or be forced down the fine by the action of the wind or the resistance of the air when the lamp is lifted upward, or by the centrifugal tendency of the gas when the lamp is swinging as for signals on a railroad. The guard will effect this object and yet permit the passage, through its perforations, of suflicient air to feed the inner side of the flame. This guard or screw is not designed to regulate the supply of air or to steady its motion, and should not be confounded with a screw in use in kerosene lamps, with chimneys, for that purpose.

The interposition of the guard in the man ner described herein, is claimed by the inventor to be an efficient means by which an out door lamp burning kerosene can be carried in any ordinary wind, or may be swung around in the manner of a railroad signal lamp without going out, the essential object being accomplished by the guard preventing the gas from being driven or falling suddenly away from the flame.

The further device of which I claim the invention is that of a cylindrical slide for raising and lowering the wick, a vertical sect-ion of which is shown in Fig. 3 of the accompanying drawing. The slide is furnished with a spring (H) to which is attached the handle E, moving up and down through the slot in the outer cylinder. The spring is inside of the slide. The office of the spring is three fold. It affords a convenient and strong attachment for the handle. It acts as a wedge to draw thecylinder tight around the wick, and may be constructed so as to cover the aperture through which the handle projects, which may have a screw attached to draw it tight enough to prevent the escape of any gas or smoke.

lVhat I claim as my invent-ion and desire to secure by Letters Patent is The device of a perforated guard or screen to be placed upon or within the central flue of a kerosene lamp, by which the lamp is better enabled to hold the flame.

HENRY (3.. HUTCHINSON.

Witnesses WM. B. WOODIN, JAS. R. Cox. 

